英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字,中文词皆可:

einsteinium    
n. 锿



einsteinium
n 1: a radioactive transuranic element produced by bombarding
plutonium with neutrons [synonym: {einsteinium}, {Es}, {E},
{atomic number 99}]

Es \Es\ n.
the chemical symbol for {einsteinium}, a transuranic element
with atomic number 99. The atomic weight of the longest-lived
isotope, with a half-life of 276 days, is 254. The first
isotope discovered, having atomic weight 253 and a half-life
of 20 days, was recognized in 1952 in the debris from a
hydrogen bomb test. As much as 3 micrograms of einsteinium
were produced by a complex process involving long irradiation
of plutonium isotopes in nuclear reactors. Its chemical
properties are those of a trivalent actinide element. --HCP61

Syn: einsteinium, atomic number 99.
[WordNet 1.5 PJC]

einsteinium
Symbol: Es
Atomic number: 99
Atomic weight: (254)
Appearance is unknown, however it is most probably metallic and silver
or gray in color. Radioactive metallic transuranic element belonging to
the
actinoids. Es-254 has the longest half-life of the eleven known isotopes
at
270 days. First identified by Albert Ghiorso and associates in the
debris of
the 1952 hydrogen bomb explosion. In 1961 the first microgram quantities
of
Es-232 were separated. While einsteinium never exists naturally, if a
sufficient amount was assembled, it would pose a radiation hazard.



安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Microsoft Support
    Microsoft Support is here to help you with Microsoft products Find how-to articles, videos, and training for Microsoft Copilot, Microsoft 365, Windows 11, Surface, and more
  • Contact Us - Microsoft Support
    Contact Microsoft Support Find solutions to common problems, or get help from a support agent
  • Microsoft 365 Customer Service and Support
    The type of support Microsoft provides for consumers depends on the product you're calling about and if you have a product for home or for business use It can also depend on if you want help for an issue with a service like OneDrive or Outlook com, or help with Windows, but you don't have an existing Microsoft 365 subscription
  • Account help - support. microsoft. com
    Get help for the account you use with Microsoft Find how to set up Microsoft account, protect it, and use it to manage your services and subscriptions
  • Home | Microsoft Community Hub
    Microsoft Learn Discover new skills, find certifications, and advance your career with interactive, hands-on learning paths Find out more Microsoft Support Search our database of official Microsoft support documentation Find how-to articles, videos, and training for Office, Windows, Surface, and more Find out more Microsoft Diversity and
  • Download OneDrive - Microsoft Support
    Contact Support For help with your Microsoft account and subscriptions, visit Account Billing Help For technical support, go to Contact Microsoft Support, enter your problem and select Get Help If you still need help, select Contact Support to be routed to the best support option Admins Admins should view Help for OneDrive Admins, the OneDrive Tech Community or contact Microsoft 365 for
  • Switch to new Outlook for Windows - Microsoft Support
    If you're not interested in trying the new Outlook for Windows just yet and don't want to be a part of this one-time switch, in classic Outlook go to File > Options> General > New Outlook options and uncheck Automatically switch me to new Outlook If you don't see this option, it means you're not currently eligible for an automatic switch to new Outlook for Windows at this time Automatic
  • Share your calendar in Outlook - Microsoft Support
    Training: In Microsoft Outlook, you can share your calendar with other people and open a shared calendar Learn how in this online video
  • Facilitator in Microsoft Teams meetings
    Facilitator in Microsoft Teams meetings The Facilitator agent works within Teams meetings for more effective collaboration, including the following features: Generates real-time AI-generated notes during meetings, allowing everyone to co-author and collaborate seamlessly Summarizes key decisions and open questions from meeting discussion
  • Windows help and learning - support. microsoft. com
    Find help and how-to articles for Windows operating systems Get support for Windows and learn about installation, updates, privacy, security and more





中文字典-英文字典  2005-2009